For my specific case, it began with open house interviews as they were trying to fill up the Animal Care Technician spots in addition to a few other positions in various departments. I arrived at the main office with resume/cover letter/references in hand, signed in and sat in a large room while interviewees were brought to small offices for brief 1:1 interviews. For the 1:1, the questions were centered around "Why would you like this position", "What experience do you have", "What are your salary expectations" etc. followed by the interviewer providing an overview of the job and asking if I could perform the basic functions (heavy lifting, bending, reaching, standing for x-amount of time and so on). They also provided a rundown of what certifications and pre-screening checks were necessary in order to be considered for the position. This included an extensive background check. After the 15-30 minute 1:1 interview, there was a bit of a waiting period before I was called back for the second interview of that day. This was with a different interviewer in a lecture hall filled with other interviews taking place. In this interview, the questions followed the S..TA.R method (Describe a time when...) and was quite brief. After making it through the interviewers list of question, I was brought to a conference room with several other interviewees to attend a presentation that provided the history, function and goals of Covance as well as a virtual tour of the facility. The presenter asked a few questions and the group answered individually, going clockwise around the table. This presentation and final interview lasted about 45 minutes. At the close, I was provided a pamphlet, pen and notebook.
After a week I received a call from the head of the Animal Care department. This was a phone screen and questions about availability. He said he'd get back to me. About twenty minutes later, I was offered the position and began at the start of the next class cycle which was about two weeks after the offer.
My recommendation is to bring your resume, cover letter, references and letters of recommendation with you as well as a pen and notebook for note taking. It is also important to come prepared with a few questions of your own so as to actually engage your interviewers.